Publication Summary

Title

A Water Quality Based Evaluation of Spokane Advanced Wastewater Treatment Plant Effluent Dilution and Receiving Water Quality During September 20-22, 1988

Month-Year PublishedJanuary 1990
Online Availability
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Short Description

On September 20-22, 1988, a receiving water study was conducted at the Spokane Advanced Wastewater Treatment Plant on the Spokane River. The objectives were: 1) to characterize mixing of the effluent plume, and 2) to make recommendations for future mixing zone boundaries. Mixing was incomplete at 300 and 1,000 feet downstream of the discharge when dilution was 20:1. Mixing was complete below the riffle area 2,600 feet downstream. A mixing zone boundary is recommended at 300 feet, despite incomplete mixing. Reduced discharge limits are recommended for ammonia, total residual chlorine and fecal coliform bacteria. Further effluent temperature and metals sampling is recommended to refine discharge limits.

Publication Number90-e07
Author(s)Carey, B.
Print Availability
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Number of pages 42 pp.
Keywords ammonia, bacteria, effluent, evaluation, fecal coliform, metals, mixing zone, quality, receiving water, river, Spokane River, stream, study, temperature, total residual chlorine, wastewater treatment plant, water, water quality
Subject Waterbodies
Spokane River
map of Washington state showing locations of subject waterbodies

This page last updated August 17, 2011